Guys! My Lenovo AF300 tablet WON'T CHARGE!! I've tried several different chargers and taken the tablet to many repair and replace shops, nothing! I would plug in the charger to the tablet and the tablet would be completely turned off!!! It would say that it's charging and so when I come back to check on it a few hours later, I find that the charger has just sucked ALL of the battery power right out of it!! HELP ME!!!